On Yom Kippur, it is forbidden to eat, to drink, to wash, to anoint, and to wear leather shoes and to have sexual relations. The King and the bride may wash their faces, and the newly delivered mother may wear leather shoes: the words of Rabbi Eliezer; and the Sages prohibit this.

One who eats food to the size of a large date, that is, the date with the kernel, or drinks a mouthful, is guilty. All kinds of food combine for the size of the date, and all liquids for the mouthful; but food and drink do not combine in the computation.

If one eats and drinks on a single occasion of obliviousness, he is liable to one sin-offering; if he has eaten and [also] done work, he is liable to two [separate] sin-offerings; if he has eaten food which is not suitable for consumption, or has drunk liquids which are not suitable for drinking, or brine or fish-brine, he is exempt [from bringing a sin-offering].

We do not force small children to fast on Yom Kippur. Rather, we train them a year or two before [they reach the age of being subject to the commandments] so that they will become accustomed to [performing] the commandments.

We feed a pregnant woman who smells [and craves food], even unkosher [food] until she recovers. We feed a sick person on the advice of an expert [doctor]. And if there is not an expert there, we feed him on his own word, until he says enough.

If one is seized with a pathological craving [for food], he is to be fed even with unkosher food, until he recovers. A person who is bitten by a mad dog must not be fed any of the dog's liver, but Rabbi Matya ben Charash permits it. Moreover, Rabbi Matya ben Charash said, If a person has a sore throat, it is permitted to put medicines into his mouth on the Sabbath, because of possible danger to his life, and whatever threatens to endanger life supersedes [the observance of] the Sabbath.

If debris falls and it is unknown whether any person is buried [under it] or not; or whether he is dead or alive, or whether he is a gentile or a Jew, we remove the debris from him on the Sabbath; if he be found alive, we extricate him, but if he is dead, we leave him.

The sin-offering and guilt-offering atone [for sin]. Death and Yom Kippur atone with repentance. Repentance atones for minor transgressions of positive or negative commandments; for grave transgressions, it obtains a respite until Yom Kippur completes the atonement.

One who says, "I will sin, and then repent, I will sin [again], and then repent," will not receive an opportunity to repent; [for one who says] "I will sin, and Yom Kipur will atone," Yom Kippur will not atone. Yom Kippur atones for transgressions between a person and God, but for a transgression against one's neighbor, Yom Kipur cannot atone, until he appeases his neighbor. Thus R. Eleazar ben Azariah expounds the text, "From all your sins before the Lord shall ye be clean": For transgressions between a person and God, Yom Kippur atones, for transgressions against one's neighbor, Yom Kippur cannot atone, until he appeases his neighbor. R. Akiva says, Happy are you, Israel! Before whom are you purified, and who purifies you [of your transgressions]? Your Father Who is in heaven. For it is said, "Then will I sprinkle clean water upon you, and ye shall be clean"; and it is also said, "The ‏ritual bath‎ [lit. Hope] of Israel is the Lord"; even as a ritual bath purifies the unclean, so does the Holy One, Blessed be He, purify Israel.